CN102160484A - Method for detecting optimal sowing density of crop - Google Patents
Method for detecting optimal sowing density of crop Download PDFInfo
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- CN102160484A CN102160484A CN 201110054313 CN201110054313A CN102160484A CN 102160484 A CN102160484 A CN 102160484A CN 201110054313 CN201110054313 CN 201110054313 CN 201110054313 A CN201110054313 A CN 201110054313A CN 102160484 A CN102160484 A CN 102160484A
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Abstract
The invention discloses a method for detecting optimal sowing density of crops. The method comprises the following steps of: firstly transmitting emission lines outward with a base point as the center in a test field; drawing up multiple circular rings or arcs outward, wherein cross position is a sowing base point; then calculating the sowing density in single circular ring or arc region according to ab/(Pi(nd+0.5d)2-Pi(nd-0.5d)2), wherein n is an nth circular ring or arc, a is the number of the sowing base points on the nth circular ring or arc, b is the number of seedlings reserved after sowing on each sowing base point, and d is the distance between adjacent sowing base points on the same emission line; and then carrying out statistic on crop yield on each circular ring or arc, and taking the highest unit area yield as the optimal sowing density. In the invention, crops are sown on multiple circular rings or arcs in concentric distribution, grading levels of cropping density are more, density gradient difference between levels is small, and the detected optimal density of the crop is accurate.
Description
Technical field
The present invention relates to a kind of crop seeding technology, relate in particular to a kind of method that detects the optimum thickness of sowing of crops.
Background technology
After the variance analysis invention, the designing technique of agricultural test develops rapidly.Outside the group of district at random commonly used, Latin square, the split block experiment, mix designing techniques such as test, Greco-Latin square, plan multiple factor experiment, balanced incomplete district group, orthogonal design and all found in succession, for experimental study scientific provides a series of useful method.As everyone knows, the density factor is being brought into play crucial effects to the influence of output, all is with a kind of method at the density factor basically to the influence research of crop yield both at home and abroad---and district's group at random, multilevel size scale is.There are two main drawbacks in this method.The one: if the horizontal quantity of classification is few, density gradient difference is excessive between each level, can not accurately study this crop optimum density; The 2nd: if the number of levels of classification is too much, the field land used is big, and the field operation easier is big, and is bigger with time error.The experimental study of carrying out with certain university is an example, and this test is adopted 36.3 ten thousand strains/hm in order to study the influence of density to non-tillage field broad bean output
2, 30.3 ten thousand strains/hm
2, 25.9 ten thousand strains/hm
2Three kinds of density are tested, and the conclusion that draws is 30.3 ten thousand strains/hm
2Processing output the highest.But because 3 levels have only been set in this test, and 3 horizontal differences gradients are too big, therefore can't determine 36.3 ten thousand strains/hm
2～25.9 ten thousand strains/hm
2Between whether also exist the output under certain level of density to be higher than 30.3 ten thousand strains/hm
2The output of density.
Summary of the invention
At the prior art above shortcomings, it is simple to the purpose of this invention is to provide a kind of detection method, and the field land used is few, and error is little, the method for the optimum thickness of sowing of detection crops that precision is high.
A kind of method that detects the optimum thickness of sowing of crops provided by the invention, this method comprises the steps:
A, choose a farmland, in the experimental field, choose a center as datum mark as the experimental field of detecting the optimum thickness of sowing of crops; With the datum mark is outwards many lines of departure of emission of basic point, and the angle between the adjacent transmission line equates; Be draw from inside to outside a plurality of annulus or circular arc of basic point again with the datum mark, the distance between adjacent annulus or the circular arc equates, with the crossover location of annulus or circular arc and the line of departure sowing basic point as crops, crop seeding to be detected sowed on the basic point;
B, calculate thickness of sowing in single annulus or the circular arc zone by following formula:
a?b/?[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein, the n representative is which annulus or the circular arc that basic point draws from inside to outside with the datum mark, n=1,2,3 A represents the sowing basic point number on n annulus or the circular arc; B represents the quantity of staying seedling behind each sowing basic point upper seeding wheel; Distance on same line of departure of d representative between the adjacent sowing basic point;
When C, crops results, the crop yield on each annulus or the circular arc is added up respectively;
D, calculate the yield per unit area of crops in each annulus (4) or the circular arc zone by following formula:
y/[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein, y represents the crop yield on n annulus or the circular arc;
E, choose thickness of sowing in the highest annulus of yield per unit area or the circular arc zone as the optimum thicknesss of sowing of this crops.
A kind of method that detects the optimum thickness of sowing of crops provided by the invention compared with prior art, has following advantage:
1, the present invention with crop seeding on a plurality of annulus or circular arc that concentric distributes, compare with the test method that conventional field density hierarchical level quantity is few, the horizontal quantity of cropping intensity classification is more, and density gradient difference is little between each level, and it is more accurate to detect the crop optimum density.
2, the present invention adopts a plurality of annulus that concentric distributes or circular arc as the hierarchical level gradient of crop seeding, compares with conventional field density hierarchical level quantity undue experimentation method, and the field operation easier is little, and error is less.
3, simultaneously, this method is easy, the field land used is few, by the crop yield on each annulus or the circular arc with to should single annulus or the ratio of the area in circular arc zone, choose thickness of sowing in the highest annulus of yield per unit area or the circular arc zone as the optimum thicknesss of sowing of this crops, the precision that detects the optimum thickness of sowing of crops is higher.
Description of drawings
Fig. 1 is the structural representation of a plurality of sowing basic points in the border circular areas;
Fig. 2 is the structural representation of a plurality of sowing basic points in the sector region.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done to describe in further detail.
A kind of method that detects the optimum thickness of sowing of crops, this method comprises the steps:
A, choose a farmland, in experimental field 1, choose a center as datum mark 2 as the experimental field 1 of detecting crop seeding density; With datum mark 2 is outwards many lines of departure 3 of emission of basic point, (18 lines of departure only draw among the figure) as shown in Figure 1, and the angle between the adjacent transmission line 3 equates; Be basic point 17 annulus that only draw among a plurality of annulus 4(figure that draw from inside to outside with datum mark 2 again), distance between the adjacent annulus 4 equates, with the crossover location of annulus 4 and the line of departure 3 sowing basic point 5 as crops, with crop seeding to be detected on sowing basic point 5.
B, calculate thickness of sowing in the single circle ring area by following formula:
ab/[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein, the n representative is which annulus that basic point draws from inside to outside with the datum mark, n=1,2,3 A represents n the sowing basic point number on the annulus; B represents the quantity of staying seedling behind each sowing basic point upper seeding wheel; Distance on same line of departure of d representative between the adjacent sowing basic point.
When C, crops results, the crop yield on every annulus 4 is added up respectively.
D, calculate the yield per unit area of crops in each circle ring area:
The area of crop yield/this single circle ring area on yield per unit area=single annulus;
Be that following formula calculates:
y/[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein, y represents the crop yield on n annulus or the circular arc.
E, choose thickness of sowing in the highest circle ring area of yield per unit area as the optimum thicknesss of sowing of this crops.
Said method adopts in the border circular areas a plurality of concentric annulus 4 is set, and with crop seeding on the sowing basic point number of annulus 4, by crop yield on each annulus and ratio to the thickness of sowing in should the bar circle ring area, be used for determining the crop output per area that this single circle ring area is interior, get the optimum thickness of sowing of the interior thickness of sowing of the highest circle ring area of yield per unit area as these crops, the precision that detects the optimum thickness of sowing of crops is higher.And both avoided the horizontal quantity of conventional field trial method density classification few, density gradient difference is excessive between each level, accurately the defective of this crop optimum density; Avoided the number of levels of conventional field trial method density classification too much again, the field operation easier is big, and is bigger with time error.
Detect the zone of the optimum thickness of sowing of crops and both can adopt border circular areas shown in Figure 1, also can adopt sector region as shown in Figure 2, Fig. 2 and Fig. 1 difference are: the line of departure 3 among Fig. 2 constitutes a sector region, with datum mark 2 is that basic point draws in a plurality of circular arc 6(present embodiments from inside to outside, circular arc is 17), its method is identical as the density classification that detects the optimum thickness of sowing of crops the most with above-mentioned employing border circular areas with beneficial effect, does not repeat them here.
Embodiment 1
To detect the logical silkworm of broad bean new varieties is example in the optimum planting density of Chongqing region bright No. 6:
In the experimental field, choose a center as datum mark; With the datum mark is outwards 60 lines of departure of emission of basic point, and the angle between the adjacent transmission line equates that angle is six degree; On every line of departure, be separated by again 0.2 meter distance as one the sowing basic point, have on every line of departure 60 the sowing basic points, each the sowing basic point stay 2 young plants.
Therefore because first ring is excessive to the five rings thickness of sowing, the field can't be operated, and the sowing of first to the 5th on every line of departure basic point is left a blank, and does not sow, and sows since the 6th sowing basic point, calculates thickness of sowing in the single circle ring area by following formula:
ab/?[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein: a=60; B=2; D=0.2.
Again the broad bean kind on each annulus is carried out bright pod results, its bright pod weight of weighing.
Calculate the yield per unit area of crops in each circle ring area at last: the area of crop yield/this single circle ring area on yield per unit area=single annulus.
Unit are (per hectare) output of crops in thickness of sowing in each annular region and each circle ring area, as shown in the table:
| Which ring | Density (strain/hm 2） | Yield per unit area kg/ |
| 6 | 795774 | 1021 |
| 7 | 682092 | 1112 |
| 8 | 596831 | 1210 |
| 9 | 530516 | 1212 |
| 10 | 477465 | 1432 |
| 11 | 434059 | 1543 |
| 12 | 397887 | 2042 |
| 13 | 367280 | 2513 |
| 14 | 341046 | 3011 |
| 15 | 318310 | 3507 |
| 16 | 298415 | 4089 |
| 17 | 280861 | 4519 |
| 18 | 265258 | 4997 |
| 19 | 251297 | 5503 |
| 20 | 238732 | 6011 |
| 21 | 227364 | 6541 |
| 22 | 217029 | 7035 |
| 23 | 207593 | 7514 |
| 24 | 198943 | 8075 |
| 25 | 190986 | 8546 |
| 26 | 183640 | 9009 |
| 27 | 176839 | 9537 |
| 28 | 170523 | 10032 |
| 29 | 164643 | 10521 |
| 30 | 159155 | 11001 |
| 31 | 154021 | 11524 |
| 32 | 149208 | 12046 |
| 33 | 144686 | 11556 |
| 34 | 140431 | 11065 |
| 35 | 136418 | 10545 |
| 36 | 132629 | 10546 |
| 37 | 129044 | 10078 |
| 38 | 125648 | 9575 |
| 39 | 122427 | 9021 |
| 40 | 119366 | 8542 |
| 41 | 116455 | 8043 |
| 42 | 113682 | 8045 |
| 43 | 111038 | 7576 |
| 44 | 108515 | 7068 |
| 45 | 106103 | 6568 |
| 46 | 103796 | 6580 |
| 47 | 101588 | 6049 |
| 48 | 99472 | 5509 |
| 49 | 97442 | 5589 |
| 50 | 95493 | 5043 |
| 51 | 93620 | 4513 |
| 52 | 91820 | 4524 |
| 53 | 90087 | 4076 |
| 54 | 88419 | 3536 |
| 55 | 86812 | 3525 |
| 56 | 85261 | 3011 |
| 57 | 83766 | 2521 |
| 58 | 82321 | 2531 |
| 59 | 80926 | 2054 |
| 60 | 79577 | 2075 |
Can find out that from table the 32nd the bright pod output of annulus unit are is the highest, reaches 12046kg/hm
2Therefore the 32nd the interior thickness of sowing of annulus is optimum density, and promptly logical silkworm is 149208 strains/hm in the Chongqing region optimum density bright No. 6
2
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (1)
1. a method that detects the optimum thickness of sowing of crops is characterized in that this method comprises the steps:
A, choose a farmland, in experimental field (1), choose a center as datum mark (2) as the experimental field (1) of detecting the optimum thickness of sowing of crops; With datum mark (2) is outwards emission many lines of departure (3) of basic point, and the angle between the adjacent transmission line (3) equates; Be draw from inside to outside a plurality of annulus (4) or circular arc of basic point with datum mark (2) again, distance between adjacent annulus (4) or the circular arc equates, with the crossover location of annulus (4) or the circular arc and the line of departure (3) sowing basic point (5) as crops, with crop seeding to be detected on sowing basic point (5);
B, calculate thickness of sowing in single annulus or the circular arc zone by following formula:
ab/[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein, the n representative is which annulus or the circular arc that basic point draws from inside to outside with the datum mark, n=1,2,3 A represents the sowing basic point number on n annulus or the circular arc; B represents the quantity of staying seedling behind each sowing basic point upper seeding wheel; Distance on same line of departure of d representative between the adjacent sowing basic point;
When C, crops results, the crop yield on each annulus (4) or the circular arc is added up respectively;
D, calculate the yield per unit area of crops in each annulus (4) or the circular arc zone by following formula:
y/[π（nd+0.5d）
2-π（nd-0.5d）
2]
Wherein, y represents the crop yield on n annulus or the circular arc;
E, choose thickness of sowing in the highest annulus of yield per unit area or the circular arc zone as the optimum thicknesss of sowing of this crops.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105594446A (en) * | 2016-02-26 | 2016-05-25 | 山东省农业科学院玉米研究所 | Method for testing response of corn hybrids to planting density |
| CN111709510A (en) * | 2020-06-15 | 2020-09-25 | 陈效庚 | Tool and method for rapidly determining field population of high-yield wheat |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930936A (en) * | 2006-09-28 | 2007-03-21 | 蒋祖明 | Method of determining seeding amount for culturing machine transplanted strong seedling |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1930936A (en) * | 2006-09-28 | 2007-03-21 | 蒋祖明 | Method of determining seeding amount for culturing machine transplanted strong seedling |
Non-Patent Citations (4)
| Title |
|---|
| 《安徽农学通报》 20091231 陈根祥等 晚播小麦生育特点及适宜密度研究 第74-77、85页 1 第15卷, 第2期 * |
| 《现代农业科技》 20101231 朱建明 华亭县玉米全膜双垄沟播密度试验 第61、63页 1 , 第2期 * |
| 《耕作与栽培》 20091231 付国林等 贵单8号不同播种密度对产量的影响 第36、38页 1 , 第2期 * |
| 《贵州农业科学》 20061231 吴仲珍等 杂交稻黔优301不同播种期和密度的栽培试验 第39-41页 1 第34卷, 第2期 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105594446A (en) * | 2016-02-26 | 2016-05-25 | 山东省农业科学院玉米研究所 | Method for testing response of corn hybrids to planting density |
| CN111709510A (en) * | 2020-06-15 | 2020-09-25 | 陈效庚 | Tool and method for rapidly determining field population of high-yield wheat |
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