CN107122870A - A kind of metering model for estimating high yield thunder bamboo grove nitrogen demand - Google Patents
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 172
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 86
- 235000017166 Bambusa arundinacea Nutrition 0.000 title claims abstract description 75
- 235000017491 Bambusa tulda Nutrition 0.000 title claims abstract description 75
- 241001330002 Bambuseae Species 0.000 title claims abstract description 75
- 235000015334 Phyllostachys viridis Nutrition 0.000 title claims abstract description 75
- 239000011425 bamboo Substances 0.000 title claims abstract description 75
- 230000012010 growth Effects 0.000 claims abstract description 21
- 239000002689 soil Substances 0.000 claims abstract description 17
- 239000000618 nitrogen fertilizer Substances 0.000 claims abstract description 16
- 239000004016 soil organic matter Substances 0.000 claims description 8
- 241000745988 Phyllostachys Species 0.000 claims description 5
- 241000196324 Embryophyta Species 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000004720 fertilization Effects 0.000 abstract description 8
- 238000013461 design Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 5
- 230000006872 improvement Effects 0.000 abstract description 4
- 230000035558 fertility Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000011161 development Methods 0.000 abstract description 2
- 238000011002 quantification Methods 0.000 abstract 1
- 239000003337 fertilizer Substances 0.000 description 36
- 235000015097 nutrients Nutrition 0.000 description 19
- 230000000694 effects Effects 0.000 description 12
- 210000003608 fece Anatomy 0.000 description 11
- 239000010871 livestock manure Substances 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 230000001965 increasing effect Effects 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 3
- 235000016709 nutrition Nutrition 0.000 description 3
- 230000035764 nutrition Effects 0.000 description 3
- 239000003895 organic fertilizer Substances 0.000 description 3
- 240000007594 Oryza sativa Species 0.000 description 2
- 235000007164 Oryza sativa Nutrition 0.000 description 2
- 230000003698 anagen phase Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 235000003715 nutritional status Nutrition 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 235000009566 rice Nutrition 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- 229910000013 Ammonium bicarbonate Inorganic materials 0.000 description 1
- 241000272525 Anas platyrhynchos Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 206010053759 Growth retardation Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 241000011500 Phyllostachys praecox Species 0.000 description 1
- 235000008545 Phyllostachys praecox Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 235000012538 ammonium bicarbonate Nutrition 0.000 description 1
- 239000001099 ammonium carbonate Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013068 control sample Substances 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010219 correlation analysis Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 231100000001 growth retardation Toxicity 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000009309 intensive farming Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
- 235000018343 nutrient deficiency Nutrition 0.000 description 1
- 235000006286 nutrient intake Nutrition 0.000 description 1
- 238000009406 nutrient management Methods 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002881 soil fertilizer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A kind of metering model for estimating high yield thunder bamboo grove nitrogen demand, the invention belongs to technical field of forestry, disclose a kind of for estimating forecast model of the thunder bamboo grove for nitrogen demand in nitrogenous fertilizer, according to the analytic statistics of fixed point and large sample (n=50) for many years, obtaining model is：N/667m2=[1 0.14 × N1/667m2‑0.32×N2/667m2+1.53×(avail)N3‑7.5×SOM]+22.5.The present invention can calculate demand of the thunder bamboo growth course for nitrogenous fertilizer according to quantification, complete fertilization compositions based on earth measurement；Contribute to perfect, abundant thunder bamboo grove high-yield cultivation technique content, improve management level；It can propose optimal nitrogen fertilising consumption suggested design according to needed for the development of thunder growth stage, woodland fertility present situation and high production bamboo shoot, implement accurate, quantitative fertilization, increase economic efficiency, save fertilising cost；Realize the operations objective of the fertile synergy of section and high-yield cultivating with improvement and soil protection ecological environment again simultaneously.
Description
Technical field
The invention belongs to agronomy technical field of forestry, propose that one kind is based under intensive farming pattern, quick estimation high yield bamboo shoot
With forecast model of the thunder growth stage for the plain demand of Nitrogen.
Background technology
Lei Zhu (Phyllostachys praecox) is grass family Bambusoideae Phyllostachys plant, is mainly distributed on Chinese river
South Mountain ground hilly country, a large amount of plantations since the 1980s, due to high efficiency, especially late fall, early winter organic materials
Cover after forcing culture, by the end of December, January goes out bamboo shoot, greatly improves the market price, and remarkable in economical benefits, every mu of net earnings reaches
To 1.5-2.5 ten thousand yuan, it is promoted in its current cultivated area on Zhejiang, Anhui, Jiangsu, Jiangxi and other places, particularly Zhe Jianghu
State city, Hangzhou, Ningbo City's cultivated area are even more swift and violent, are local main economic bamboo kinds.Because its growth is quick, renewal speed
It hurry up, be even more that nutritive value is good because phyllostachys pracecox shoots quality is delicious, be high-quality shoot use bamboo shoot, market prospects are had an optimistic view of.
At present, Lei Zhu is the high-quality shoot use bamboo shoot resource of the provinces such as Zhejiang, Anhui, Jiangsu, Fujian.Annual preliminary system in 2015
Meter shows that Zhejiang Province's annual production reaches ten thousand tons of 2.2-2.3, and the output value reaches 3.3 hundred million yuans, is imitated with higher economic society
Benefit, is that Regional Forestry dominates woods special product product.
Thunder bamboo rhizome-root system growth distribution on underground, bamboo whip raw whip bud, differentiation of shoot bud needs enough nutrition and suitable
The need for its Growth and Differentiation of suitable water satisfied, nitrogen, phosphorus, potassium and trace element are the basic nutrition members for promoting bamboo to grow
Element, nutrient deficiency causes growth retardation, and yield declines, and applying fertilizer excessively can cause utilization rate of fertilizer to reduce, and cause fertilizer
Material is superfluous to trigger environmental pollution.At present, the report document increased production that applied fertilizer on thunder bamboo grove is more, mainly around organic fertilizer and chemical fertilizer
Under compounding application, the relevant report of volume increase is reached, mainly under fertilizer total amount matching requirements, with appropriate fertilization mode such as one
Different growing stage applies produced bamboo shoots effect of increasing production in year, however, being directed to the volume increase of specific nutrient element species so far
Effectiveness report is few.Because thunder bamboo management condition differs larger, show that the soil nutrient status of forest land in itself has differences,
In addition, standing forest strain number density is different also to produce influence to nutrient consumption and fertilizer consumption.
Nitrogen (N) nutrient grows the most nutrient of demand as thunder bamboo, at present, based on excavation bamboo shoots target
The nitrogen nutrient management of operation is planned strategies for, and achievement in research is less, and nitrogen is obtained from the inorganic fertilizers such as organic fertilizer, composite fertilizer, high yield thunder bamboo
The precision demand amount of woods nitrogen needs annual overall balance metering, and draws thunder bamboo nitrogen manure by the contrast of different year
Application effect, by field fertilization design and thunder Shoot yield actually cumulative measurement, draw high yield with regression calculation model
Thunder bamboo shoot woods nitrogen demand model.In summary, the problem of prior art is present be：Thunder bamboo grove is directed to the demand of specific nutrient element
Rule, and fertilising yield increasing effect report are less, and action rule of a certain nutrient for yield is drawn from law of minimum nourishment, because
To there is synergy between nutrient element, the production-increasing function of single nutrient needs the comprehensive function in other envirment factors to issue
The effect of waving, this is to solve the difficult point place that nutrient element effect of increasing production is quantitatively judged.As the thunder bamboo grove continuously managed, analysis exists
Under intensive management technical measures, thunder Shoot yield is starting point of the invention for the dependency relation between nitrogen quantity delivered,
It is the key point that metering model is built.
The content of the invention
The problem of existing for prior art, the invention provides a kind of prediction mould for estimating thunder bamboo grove nitrogenous fertilizer demand
Type.
Implementation method of the present invention is yes：With under fertilizer application pattern, according to different fertilizer type and its consumption, according to
Nitrogen element Content of Nutrients, is divided into fertilising and bamboo shoot output beasurement base, standing forest size is set as with thunder bamboo grove
20 × 20m, i.e., be experimental field 0.60 mu.Since according to 2 years, annual dose converts the total input amount of nitrogen, and bamboo shoots then
Early stage nitrogen input quantity is harvested, total input nitrogen nutrient quantity is calculated, while determining plough horizon 0-20cm Soil Availables
Property nitrogen nutrient content, and soil fertility main source soil organic matter content, fertilising sample is set and control sample
(CK), the present invention is that the investigation statisticses based on 50 pieces of sample ground draw data, according to the yield sequence of bamboo shoots per mu yield height with it is corresponding
Soil Nitrogen Content, correlation model is drawn with grey correlation analysis.
Estimation high yield thunder bamboo grove nitrogenous fertilizer demand forecast model be：
N/667m2=[1-0.14 × N1/667m2-0.32×N2/667m2+1.53×(avail)N3-7.5×SOM]+
22.5。
In formula：N/667m2：Every mu of high yield thunder bamboo grove amount of nitrogen：Unit kilogram；
N1/667m2：The average amount of nitrogen of every mu of thunder bamboo grove of the previous year：Unit kilogram；
N2/667m2：Nitrogen application during early growth stage total amount then：
N3：The average quick-acting nitrogen content mg/kg of timbered soil arable layer 0-20cm；
SOM：Soil organic matter content %.
The present invention is intended to provide one kind application formula, for quickly calculating under different thunder bamboo management situations, high yield woods institute
The demand of correspondence nitrogenous fertilizer, can be used to quickly estimate thunder growth for nitrogen demand.
Another object of the present invention is to provide the forecast model of estimation thunder bamboo grove nitrogenous fertilizer demand, suitable plant is grass
Section Bambusoideae Phyllostachys plant-Lei Zhu, emphasis is standing forest bamboo shoots increment for nitrogen need assessment.
Advantages of the present invention and effect are：The fertilising of thunder bamboo grove is mainly advised according to its different growth phases for nutrient demand
Rule, carries out specific aim fertilising, carries out in terms of fertilizer type selection, fertilizer amount and fertilizer application mode, bamboo shoots are improved to realize
The target of yield and nutrient balance, and there is empirical fertilising in thunder bamboo grove fertilising at present, with uncertainty.
The consumption of nitrogenous fertilizer is most in the fertilising of thunder Bamboo Soil, and nitrogen is that Lei Zhu differentiation of shoot bud and bamboo shoots form institute again
The element that nutrition is most is needed, in order to reach saving, reasonable and efficient applied nitrogen, utilization rate of fertilizer is improved, reduces due to not true
Fertilizer loss caused by qualitative fertilising, reaches the fertile synergy purpose of section, carries out fertilising metering.According to specific thunder bamboo grove slitting part,
Fertilizers input, soil nutrient status etc., by monitoring soil nitrogen nutrient and bamboo shoot output, statistical is carried out with sample-plot survey
Result is analysed, different thunder growth features are drawn, show that high yield thunder bamboo grove is measured for the demand of nitrogen nutrient, is had according to metering
Effect improves nitrogen manure utilization rate, reduces the amount of application of nitrogen manure, and nitrogen manure saves consumption 15-20%, and yield
Do not subtract, save fertilizers input cost.Calculated by nitrogen demand, can effectively carry out the matching design of fertilizer, it is ensured that nitrogen
Element supply balance, improves fertilizer efficiency and Lei Zhu growth efficiencies.
Thunder bamboo Stand Growth, hair bamboo shoot can be calculated with model of the present invention, during Cheng Zhu, interim growth course pair
In the demand of nitrogen, the thunder bamboo grove amount of application of nitrogen fertilizer estimation based on standing forest bamboo shoots in high yield level；Based on standing forest yardstick and intensive
Change under cultivation mode, the anniversary of thunder bamboo grove nitrogen manure consumption and plans strategies for rational application of fertilizers Demand Forecast.
The present invention can quantify the demand for calculating thunder bamboo growth phase for fertilizer nitrogen, and different nitrogenous fertilizer are calculated accordingly and are used
Amount, helps to complete fertilization compositions based on earth measurement.On the one hand the utilization rate of nitrogen manure is improved, nitrogen manure is on the other hand reduced
Loss or decomposition, calculating annual every mu by model can reduce by 15-20% fertilizer amount, be favorably improved economic benefit,
Improve forest land management level；It can be proposed optimal according to needed for thunder growth stage, woodland fertility present situation and high production bamboo shoot
Nitrogen puts into the suggested design of consumption.
Counted according to 5 years, save nitrogen input fertilizer application mode, bamboo shoot output is not reduced not only, the per mu yield of unit plane just
Amount increases production 16-24% on the contrary, while can active balance soil nitrogen nutrient situation, improvement timbered soil structure, increase soil fertilizer
Power.Accordingly, it is capable to realize the fertile synergy of section and high yield operations objective.The accurate supplement of nitrogen, is to realize that thunder growth applies fertilizer on demand,
Improve the common-denominator target of nitrogen manure utilization rate.The advantage of invention model be can according to forest land actual nutrient levels, especially before
Phase nitrogen nutrient Input and thunder bamboo grove throughput requirements, complete fertilization recommendation, including nitrogen manure selection, fertilizer amount and apply
With the specific link such as method, grown so as to preferably meet phyllostachys pracecox shoots with woods, the multiple mesh of cost-saving synergistic and improvement environment
Mark.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
It is provided in an embodiment of the present invention estimation thunder bamboo grove nitrogenous fertilizer demand forecast model be：
N/667m2=[1-0.14 × N1/667m2-0.32×N2/667m2+1.53×(avail)N-7.5×SOM]+
22.5。
In formula：N/667m2：Every mu of high yield thunder bamboo grove amount of nitrogen：Unit kilogram (kg), N1/667m2：Every mu of thunder bamboo of the previous year
The average amount of nitrogen of woods：Unit kilogram (kg), N2/667m2：Nitrogen application during early growth stage total amount, (avail) N then3：Timbered soil arable layer 0-
The average quick-acting nitrogen contents (mg/kg) of 20cm, SOM：Soil organic matter content %.
The thunder bamboo grove nitrogen magnitude of recruitment and effect that case study on implementation of the present invention is provided are based on accomplished below：
(1) fertilising of the formulation fertilizer containing nitrogen of thunder bamboo grove is put into and counted, virgin woodland data, parameter setting in metering model,
The determination of weight coefficient is obtained by forest land statistics；
(2) soil nutrient index, the strict accurate statistics such as fertilizers input amount；Calculate that fertilizer is used with nitrogen metering model
Amount, completes to apply fertilizer according to amount of calculation.
(3) thunder bamboo grove fertilising actual effect data are by comparing acquisition, with nitrogen metering model fertilization recommendation, with experience
Property fertilising exist difference and actual effect control development compare；
(4) it is based on 40 pieces of study plots that the thunder growth stage (anniversary), which needs nitrogen metering model parameter designing and weight to assign,
Obtain；It can be analyzed according to actual fertilization effect, and in time to model correction and parameter adjustment, to ensure model accuracy.
The application effect of the present invention is explained in detail with reference to specific implementation case.
Fertilizer test area is distributed in the Yan Tou villages of Ningbo City, Zhejiang Province Fenghua City Xikou Zhen, Yu and opens Yangchuan village, Ren Song villages, Ban Xi
9 Lei Zhu production bases such as village, Ting Xiahu villages, Kang Ling villages, abnormal mountain village, Dianbai village, lake mountain village, fertilising standing forest be winter forest land cover
Lid thunder bamboo grove, earth's surface is covered with rice chaff, and rice chaff thickness 35-40cm, duck excrement needs nitrogen meter as hot organic fertilizer is made using above-mentioned
Amount model is carried out nitrogen application and planned strategies for design.Forest land nitrogenous fertilizer mainly applies species：Urea CO (NH2)2, ammonium hydrogen carbonate
NH4HCO3, composite fertilizer etc., above-mentioned fertilizer last year, input amount was converted to actual nitrogen content then, in 2010 to 2014
Experiment fertilising is carried out, monolithic forest land area is 20m × 20m, i.e., 0.60 mu, 40 pieces of study plots are set, and set 10 pieces of control
(CK) it is compared, Continuous Observation 5 years, obtains bamboo shoots annual production data and harvesting bamboo shoots this season soil nitrogen nutrient situation.
The result of fertilizer test shows that the utilization effect of above-mentioned nitrogen demand metering model significantly, can be empirical than ever
Nitrogen 26.3-31.5% is saved in fertilising, and nitrogen manure saves consumption 15-20%, and average every mu of fertilising cost reduces 125.5-
178.8 yuan, per hectare reduces 1882.5-2682.0 yuans, and whole trial zone is according to current production scale, forest land 7000
Mu, can save more than 120 ten thousand yuan of fertilizer cost, economical, societal benefits are very notable every year.The forecast model of nitrogenous fertilizer demand has
Preferable reappearance, performance model can preferably realize that forest land nitrogen manure is precisely supplemented, and popularizing application prospect is had an optimistic view of.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all the present invention's
Any modifications, equivalent substitutions and improvements made within spirit and principle etc., should be included in the scope of the protection.
Model checking case 1-3 verification process (2013-2015 years)：
N/667m2=[1-0.14 × N1/667m2-0.32×N2/667m2+1.53×(avail)N3-7.5×SOM]+
22.5。
In formula：N/667m2：Every mu of high yield thunder bamboo grove amount of nitrogen：Unit kilogram (kg), N1/667m2：Every mu of thunder bamboo of the previous year
The average amount of nitrogen of woods：Unit kilogram (kg), N2/667m2：Nitrogen application during early growth stage total amount, (avail) N then：Timbered soil arable layer 0-
The average quick-acting nitrogen contents (mg/kg) of 20cm, SOM：Soil organic matter content %.
Case 1：The Fenghua of Ningbo in 2013 Kang Lingcun thunder bamboo groves 1：
N1/667m2, 2012 every mu of annual amount of nitrogen 60kg, N2/667m2：Nitrogen application during early growth stage total amount 28kg then, forest land soil
Average available nitrogen (avail) the N content 55mg/kg of 0-20cm of earth arable layer, soil organic matter content 4.2% is then calculated according to formula
Amount of nitrogen is within 2012：1-0.14 × 60-0.32 × 28+1.53 × 55-7.5 × 4.2%+22.5=1-8.4-8.96+
84.15-0.315+22.5=89.975kg
Case 2：2014 Nian Kangling villages thunder bamboo groves 1：
N1/667m2, 2013 every mu of annual amount of nitrogen 89.975kg, N2/667m2：Nitrogen application during early growth stage total amount 15kg, woods then
Average available nitrogen (avail) the N content 60mg/kg of ground 0-20cm of plough horizon, soil organic matter content 3.9%, then according to formula
Calculating amount of nitrogen in 2013 is：1-0.14 × 89.975-0.32 × 15+1.53 × 60-7.5 × 3.9%+22.5=1-
12.5965-4.8+91.8-0.2925+22.5=97.611kg
Case 3：2015 Nian Kangling villages thunder bamboo groves 1：
N1/667m2, 2013 every mu of annual amount of nitrogen 97.611kg, N2/667m2：Nitrogen application during early growth stage total amount 26kg, woods then
Average available nitrogen (avail) the N content 58mg/kg of ground 0-20cm of plough horizon, soil organic matter content 4.5%, then according to formula
Calculating amount of nitrogen in 2014 is：89.917kg.
By continuously keeping track of with statistical process same thunder bamboo grove, the amount of nitrogen reappearance drawn according to model
It is good, the nitrogen Input Level of actual fertilizer application can be reflected.
Claims (3)
1. a kind of forecast model for estimating thunder bamboo grove nitrogenous fertilizer demand, it is characterised in that the estimation thunder bamboo grove nitrogenous fertilizer demand
Forecast model be：
N/667m2=[1-0.14 × N1/667m2-0.32×N2/667m2+1.53×(avail)N3-7.5×SOM]+22.5；
In formula：N/667m2：Every mu of high yield thunder bamboo grove amount of nitrogen：Unit kilogram；
N1/667m2：The average amount of nitrogen of every mu of thunder bamboo grove of the previous year：Unit kilogram；
N2/667m2：Nitrogen application during early growth stage total amount then：
(avail)N3：The average quick-acting nitrogen content mg/kg of timbered soil arable layer 0-20cm；
SOM：Soil organic matter content %.
2. the thunder bamboo grove of the forecast model of thunder bamboo grove nitrogenous fertilizer demand is estimated described in a kind of application claim 1.
3. the grass family Bambusoideae Phyllostachys of the forecast model of thunder bamboo grove nitrogenous fertilizer demand is estimated described in a kind of application claim 1
Plant.
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| CN109211801A (en) * | 2018-09-03 | 2019-01-15 | 中国科学院南京土壤研究所 | A kind of crop nitrogen demand real time acquiring method |
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