CN107945041A - A kind of rice envelope row time computational methods based on dummy model - Google Patents

A kind of rice envelope row time computational methods based on dummy model Download PDF

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CN107945041A
CN107945041A CN201711078014.5A CN201711078014A CN107945041A CN 107945041 A CN107945041 A CN 107945041A CN 201711078014 A CN201711078014 A CN 201711078014A CN 107945041 A CN107945041 A CN 107945041A
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plant
mrow
rice
blade
area
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丁维龙
谢涛
徐岩
徐利锋
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Zhejiang University of Technology ZJUT
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Abstract

A kind of rice envelope row time computational methods based on dummy model, the morphological parameters of the plant obtained by field trial, with reference to the rice functional architecture model of existing single plant plant, construct the virtual growth scene of Rice Population, relation between the quantity of illumination is received according to agriculturally plant envelope row time and plant leaf, the calculating for sealing the row time is quantified, utilizes computer technology, by the simulation to virtual paddy growth scene, the envelope row time of plant population is calculated.Compared to traditional field trial method, the experiment of envelope row time is such as controlled using potted plant and gauze covering treatment plant, reduces manpower, operational sequence and duration of experiment.

Description

A kind of rice envelope row time computational methods based on dummy model
Technical field
The present invention relates to a kind of rice based on dummy model to seal row time computational methods, and this method is suitable for field water The rice colony envelope row time determines.
Technical background
Virtual plant model is the dummy model of the real plants generated in a computer using computer technology.Utilize Virtual plant model, not only can really reproduce natural landscape, generation scene of game, make video display animation, structure gardens rule Draw etc., can also be using the physiological structure model of plant, the dynamic growth course of Visualization plant, so as to main raw Produce link and carry out dynamic regulation, be the production service of agriculture and forestry.Virtual plant is all shown in numerous areas preferably should With prospect, no matter from science or the angle of technology, the research of virtual plant is all important and extremely challenging research side To.
Envelope row is a key concept for agriculturally analyzing light situation between crop groups, allows crop field to seal in due course capable to excellent The cultivation for changing rice is of great significance.Since the rice species in China is various, the good characteristic of variety classes rice is suitable Ecological environment and rational cultivation condition under could fully show.Determining for row time, most root are sealed in production at present Determined according to plantation experience and field trial, time-consuming and intricate operation, it is impossible to be rapidly adapted to it for different plant type selections The Plant plane of growth.
Dummy model based on rice, from angle of the plant away from blade luminous absorption between influence plant, will agriculturally plant Established between the concept and plant leaf area of strain envelope row it is quantitative contact, propose Rice Population envelope row under a kind of different spacing in the rows The computational methods of time, the optimization for actual Rice Cropping spacing in the rows provide reference.
The content of the invention
In order to overcome, agriculturally envelope the definite of row time determines according to plantation experience and field trial mostly at present, takes And intricate operation, it is impossible to which the problem of being rapidly adapted to the Plant plane of its growth for different plant type selections, the present invention proposes A kind of rice envelope row time computational methods based on dummy model, this method according to agronomy correlation theory, with reference to set forth herein Leaf area computational methods quantify to agriculturally sealing capable concept, based on virtual rice model, can quickly calculate Current envelope row time of the plant away from lower plant.
The technical solution that in order to solve the above-mentioned technical problem provides of the present invention is：
A kind of rice envelope row time computational methods based on dummy model, using virtual rice model, construct rice group The growth scene of body, by the relation between the concept of agriculturally plant envelope row and adjacent plant intersecting area leaf area, calculates and plants The envelope row time of group of hill body, wherein, the calculating bag of the adjacent plant intersecting area leaf area based on virtual rice model Include following steps：
(1.1) for two plants of adjacent rice, the plant type parameter of acquisition two plants of rice of current time, including rice rice1 Stem quantity StemNun1, the blade quantity LeafNum1 [i] that i-th of stem includes, the quantity of the stem of rice rice2 StemNum2, the blade quantity leafNum2 [j] that j-th of stem includes；
(1.2) all blades on each stem of plant rice1 and plant rice2 are traveled through, are judged in intersecting area Blade sections, and calculate the size of two plants of plant intersection blade areas.
(1.3) calculate the vaned leaf area of institute in plant rice1 and plant rice2 adjacent areas and；
The envelope row time computational methods based on dummy model comprise the following steps：
(2.1) two plants of plant intersection areas are calculated and account for percentage of the two plants of plant in left and right in total leaf area in the ranks Pn：
(2.2) calculate Rice Population and often locate the corresponding percentage P of intersectionnValue, order work as PnValue be more than intersection Area accounts for the critical value p of the total leaf area of intersecting area0When, it is believed that two plants of plant intersect and have blocked ground in the ranks；Work as water When the quantity of the adjacent plant on ground is blocked in rice colony more than 90%, it is believed that row, p have been sealed in the region0Value can basis Different plant types are set.
Further, in the step (1.1), real structure parameter that the structure of rice model is obtained based on field trial, The characteristics of locus and leaf area size of blade and stem reflect true rice plant.
Further, in the step (1.2), under calculating of the intersecting area comprising blade sections and leaf area includes Row operation content：
(1.2.1) determines the subpoint a and point b of the longest blade of two plants of plant projected length in adjacent area respectively；
Each blade of each stem of (1.2.2) traversal plant rice1 and rice2, calculate projection fall section a and b it Between the sum of the leaf area of blade sections.
Further, in the step (2.2), intersection area accounts for the two plants of plant in left and right in total leaf area in the ranks Percentage critical value p0, determined according to the relation blocked mutually between agriculture blade luminous absorption situation and interlaced leaves.
Beneficial effects of the present invention are shown：
1) present invention simulates the growth course of true rice using virtual rice model, by Measurement of Leaf Area In Rice and agricultural The envelope row time of upper rice is combined, and completes the calculating to the rice envelope row time in a computer.
2) growth of true rice is simulated using virtual rice model, more can quickly calculates Rice Population The envelope row time, for crop field seal the row time definite offer necessarily refer to.
Brief description of the drawings
Fig. 1 be 5*5 Rice Population overlook schematic diagram, line-spacings of the H between rice, spacing in the rows of the D between rice,Generation Table man power single stem rice, ScrossFor rice plant in the ranks in intersection region intersection leaf area size.
Fig. 2 is single stem schematic diagram of the plant rice1 and rice2 that are d for two plants of spacing in the rows, point O1And O2Respectively two plants plants The growing point of strain, point b and point a are respectively that subpoint on the ground is farthest apart from growing point in all blades of two plants of plant Blade projected position on the ground.
Fig. 3 is the schematic diagram of rice leaf, and vein form when left figure is rice leaf bending, right figure is blade straight condition Under form.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings.
Referring to Figures 1 and 2, a kind of rice envelope row time computational methods based on dummy model, utilize virtual rice mould Type, constructs the growth scene of Rice Population, by concept and the adjacent plant intersecting area leaf area of agriculturally plant envelope row it Between relation, calculate envelope row time of plant population, wherein, the calculating bag of " the adjacent plant intersecting area leaf area " Include following steps：
(1.1):The plant type parameter of two plants of rice of current time is obtained, includes the quantity of the stem of rice rice1 StemNun1, the blade quantity LeafNum1 [i] that i-th of stem includes, the quantity StemNum2 of the stem of rice rice2, j-th The blade quantity leafNum2 [j] that stem includes.
(1.2):All blades on each stem of plant rice1 are traveled through, calculate blade in O1And O2Between projection length Size is spent, obtains the subpoint b of the longest blade of projected length；Travel through all blades on each stem of plant rice2, meter Blade is calculated in O1And O2Between projected length size, obtain the subpoint a of the longest blade of projected length；
The calculating that the intersecting area includes blade sections and leaf area includes following operation content：
(1.2.1) determines the subpoint a and point b of the longest blade of two plants of plant projected length in adjacent area respectively；
Each blade of each stem of (1.2.2) traversal plant rice1 and rice2, calculate projection fall section a and b it Between the sum of the leaf area of blade sections
(1.3):Travel through each blade of each stem of plant rice1 and rice2, calculate projection fall section a and b it Between the sum of the leaf area of blade sections Scross。
The envelope row time for calculating plant population comprises the following steps：
(2.1) two plants of plant intersection areas are calculated and account for percentage of the two plants of plant in left and right in total leaf area in the ranks Pn：
(2.2) calculate Rice Population and often locate the corresponding percentage P of intersectionnValue, order work as PnValue be more than intersection Area accounts for the critical value p of the total leaf area of intersecting area0When, it is believed that two plants of plant intersect and have blocked ground in the ranks；Work as water When the quantity of the adjacent plant on ground blocked in rice colony exceeding predetermined threshold value (value 90%), it is believed that row has been sealed in the region, p0Value set according to different plant types.
In the step (2.2), the percentage that intersection area accounts for total leaf area of the two plants of plant in left and right in the ranks faces Dividing value p0, determined according to the relation blocked mutually between agriculture blade luminous absorption situation and interlaced leaves.
Two plants of left and right plant is as follows in total leaf area computational algorithm step of blade in the ranks：
(3.1):The blade on plant rice1 and rice2 stem is traveled through, judges whether blade falls in O1And O2Between, if It is that then judgement is the blade of plant rice1 or plant rice2, and the blade of plant rice1 is saved in set Leafarea1, the blade of plant rice2 is saved in set leafarea2；If it is not, then a piece of blade under traversal.
(3.2):Using formula below to falling in O1And O2Between blade area add up, then calculate two plants of plant Positioned at O1And O2Between the sum of all blade areas Sall：
Wherein, leafarea1 [j] [i] and leafarea2 [j] [i] is respectively on plant rice1 and rice2 jth stem The leaf area size of i-th blade.

Claims (4)

  1. A kind of 1. rice envelope row time computational methods based on dummy model, it is characterised in that：Utilize virtual rice model, structure Go out the growth scene of Rice Population, by the pass between the concept of agriculturally plant envelope row and adjacent plant intersecting area leaf area System, calculates the envelope row time of plant population, wherein, the adjacent plant intersecting area leaf area based on virtual rice model Calculating comprise the following steps：
    (1.1) for two plants of adjacent rice, the plant type parameter of two plants of rice of current time is obtained, includes the stem of rice rice1 Quantity StemNun1, the blade quantity LeafNum1 [i] that i-th of stem includes, the quantity StemNum2 of the stem of rice rice2, The blade quantity leafNum2 [j] that j-th of stem includes；
    (1.2) all blades on each stem of plant rice1 and plant rice2 are traveled through, judge the blade in intersecting area Section, and calculate the size of two plants of plant intersection blade areas；
    (1.3) calculate in plant rice1 and plant rice2 adjacent areas the vaned leaf area of institute and；
    The envelope row time for calculating plant population comprises the following steps：
    (2.1) two plants of plant intersection areas are calculated and account for percentage P of the two plants of plant in left and right in total leaf area in the ranksn：
    <mrow> <msub> <mi>p</mi> <mi>n</mi> </msub> <mo>=</mo> <mfrac> <msub> <mi>S</mi> <mrow> <mi>c</mi> <mi>r</mi> <mi>o</mi> <mi>s</mi> <mi>s</mi> </mrow> </msub> <msub> <mi>S</mi> <mrow> <mi>a</mi> <mi>l</mi> <mi>l</mi> </mrow> </msub> </mfrac> </mrow>
    (2.2) calculate Rice Population and often locate the corresponding percentage P of intersectionnValue, order work as PnValue be more than intersection area Account for the critical value p of the total leaf area of intersecting area0When, it is believed that two plants of plant intersect and have blocked ground in the ranks；As rice group When the quantity of the adjacent plant on ground blocked in body exceeding predetermined threshold value, it is believed that row, p have been sealed in the region0Value according to difference Plant type set.
  2. 2. the computational methods of the adjacent plant intersecting area leaf area based on dummy model as claimed in claim 1, its feature It is：In the step (1.1), real structure parameter that the structure of rice model is obtained based on field trial, blade and stem The characteristics of locus and leaf area size reflect true rice plant.
  3. 3. the leaf area computational methods in the intersecting area of adjacent plant as claimed in claim 1 or 2, it is characterised in that：Institute State in step (1.2), the calculating that the intersecting area includes blade sections and leaf area includes following operation content：
    (1.2.1) determines the subpoint a and point b of the longest blade of two plants of plant projected length in adjacent area respectively；
    Each blade of each stem of (1.2.2) traversal plant rice1 and rice2, judges whether blade falls in O1And O2Between, If it is, judgement is the blade of plant rice1 or plant rice2, the blade of plant rice1 is saved in set Leafarea1, the blade of plant rice2 is saved in set leafarea2；If it is not, then a piece of blade under traversal.
    (1.2.3) is using formula below to falling in O1And O2Between blade area add up, then calculate two plants of plant be located at O1And O2Between the sum of all blade areas Sall：
    <mrow> <msub> <mi>S</mi> <mrow> <mi>a</mi> <mi>l</mi> <mi>l</mi> </mrow> </msub> <mo>=</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>S</mi> <mi>t</mi> <mi>e</mi> <mi>m</mi> <mi>N</mi> <mi>u</mi> <mi>m</mi> <mn>1</mn> </mrow> </munderover> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>L</mi> <mi>e</mi> <mi>a</mi> <mi>f</mi> <mi>N</mi> <mi>u</mi> <mi>m</mi> <mn>1</mn> <mrow> <mo>&amp;lsqb;</mo> <mi>j</mi> <mo>&amp;rsqb;</mo> </mrow> </mrow> </munderover> <mi>l</mi> <mi>e</mi> <mi>a</mi> <mi>f</mi> <mi>a</mi> <mi>r</mi> <mi>e</mi> <mi>a</mi> <mn>1</mn> <mrow> <mo>&amp;lsqb;</mo> <mi>j</mi> <mo>&amp;rsqb;</mo> </mrow> <mrow> <mo>&amp;lsqb;</mo> <mi>i</mi> <mo>&amp;rsqb;</mo> </mrow> <mo>+</mo> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>j</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>S</mi> <mi>t</mi> <mi>e</mi> <mi>m</mi> <mi>N</mi> <mi>u</mi> <mi>m</mi> <mn>2</mn> </mrow> </munderover> <munderover> <mi>&amp;Sigma;</mi> <mrow> <mi>i</mi> <mo>=</mo> <mn>0</mn> </mrow> <mrow> <mi>L</mi> <mi>e</mi> <mi>a</mi> <mi>f</mi> <mi>N</mi> <mi>u</mi> <mi>m</mi> <mn>2</mn> <mrow> <mo>&amp;lsqb;</mo> <mi>j</mi> <mo>&amp;rsqb;</mo> </mrow> </mrow> </munderover> <mi>l</mi> <mi>e</mi> <mi>a</mi> <mi>f</mi> <mi>a</mi> <mi>r</mi> <mi>e</mi> <mi>a</mi> <mn>2</mn> <mrow> <mo>&amp;lsqb;</mo> <mi>j</mi> <mo>&amp;rsqb;</mo> </mrow> <mrow> <mo>&amp;lsqb;</mo> <mi>i</mi> <mo>&amp;rsqb;</mo> </mrow> </mrow>
    Wherein, leafarea1 [j] [i] and leafarea2 [j] [i] is respectively i-th on plant j-th of stem of rice1 and rice2 The leaf area size of blade.
  4. 4. the rice envelope row time computational methods based on dummy model as claimed in claim 1 or 2, it is characterised in that：It is described In step (2.2), intersection area accounts for percentage critical value p of the two plants of plant in left and right in total leaf area in the ranks0, according to agriculture The relation blocked mutually between industry blade luminous absorption situation and interlaced leaves determines.
CN201711078014.5A 2017-11-06 2017-11-06 A kind of rice envelope row time computational methods based on dummy model Pending CN107945041A (en)

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