| This investigation is about Maize and soybean strip intercropping planting pattern in Sichuan hilly area of central Sichuan Basin,constructing the classification standard of Maize and soybean yield,analysis of yield components and distribution of composite group,yield potential and its relationship with ecological factors,the results are as follows:1. Through the212experimental data points about maize and soybean yield grade construction show,maize and soybean yields in4737-7590group compound kg/ha belongs to low level;7590-9465kg/ha belongs to middle level;9465-12105kg/ha to high level.180plots in Shehong,Guang’an,Renshou production in the survey,high-yield plots accounted for the regional general survey plots were21.7%,13.3%,15%;the middle block number accounts for the regional general survey plots were55%,36.7%,51.7%;the number of low yield plots for the regional general survey plots were23.3%,50%,33.3%. High,middle,low,yield plots of the total survey plots were16.7%,47.8%,35.5%.In total,middle and low yield field investigation plots were83.3%.High-yield field in different regions of the proportion is small,Shehong,Renshou,the middle plot ratio,the largest proportion of Guang’an is low yield.Maize-soybean strip intercropping soybean composite cropping systems in the hilly region of Sichuan Province has great production space.2. Shehong, Guang’an, Renshou maize and soybean yields the variation coefficient, respectively13.93%,16.10%,14.92%. Yield components of different area, variation coefficient of Shehong ear NO.,plant NO., soybean pod number, respectively20.10%,23.70%,13.30%;Guang’an ear NO.,kernel NO.,maize soybean pod variation range is bigger, respectively20.50%,13.40%,14.30%; Renshou maize kernel NO., plant NO. of variation range is bigger,13%,19.20%.Direct contribution to yield of Ear No.in Shehong, Guang’an is bigger than Renshou,direct contribution of kernel No.in Renshou,Guang’an is bigger than shehong.The factor interaction effect among yield components,resulting in the final and composite yield is directly related to the effective panicle number of soybean and Ear No.,only the effective number of Guang’an soybean is significant positive correlation.Composite production potential of Shehong,Renshou,Guang’an is nearly12608.5kg/ha,12397.7kg/ha,12086.1kg/ha, close to the net maize and soybean potential yield, but obviously higher than fact composite yield.Different regional composite yield has a great yield potential.3. Different yield levels of maize-soybean composite yield showed very significant difference, were caused to differences in maize and soybean effective panicle number.High yield of composite plots, maize yield,effective panicle,soybean yield,soybean plant NO.,nearly compared with the middle block14.9%,15.6%,16.8%,12.1%,20.2%;The low yield plots were46.3%,45.5%,52.2%,50.1%,39.6%,9.1%.The middle yield ground is higher than low yield plots were25.8%,9.9%,13.7%,33.7%,16.1%,15.9%.Ear No., kernel No., the effective number of soybean,soybean pod have large range of variation in different level yield plots,and the range of variation is consistent,which shows that all plots may have a larger increase yield.The middle plots mainly maize grain number increase,low yield plots mainly soybean pod upgrade.The maximum yield of maize and soybean intercropping plots composite yield up to12959.84kg/ha,the middle block up to12315.28kg/ha, the maximum potential yield low yield plots for the10732.46kg/ha.Potential yield between high and middle origin had little difference, but was significantly higher than that of low yield plots.4. Different regions of composite yield with nitrogen content and organic matter, significant positive correlation.Guang’an composite yield was significant positive correlation with available nitrogen,available potassium content;Renshou composite yield was significant positive correlation with potassium content;Shehong composite yield is significantly positive correlation with available nitrogen.High and middle yield plots soil organic matter content and total nitrogen,available nitrogen,available potassium content were significantly higher than that of low yield plots.maize and soybean yield is significant positive correlation between the content of soil organic matter,total nitrogen,available nitrogen,available potassium content,the correlation coefficients were:0.228*,0.239*,0.209*,0.203*.Ear No. had significant positive correlation with the content of soil organic matter, total nitrogen,available nitrogen content,the correlation coefficients were0.238*,0.214*,0.218*.kernel No. was significantly positive correlation with soil available potassium content, the correlation coefficient is0.241*;Maize1000-grain weight was positively correlated with total phosphorus content, the correlation coefficient is0.240*.The effective number of soybean is significant positive correlation with the content of soil organic matter,available nitrogen content,the correlation coefficient is0.215*,0.229*;Seed number per pod of soybean was significant positive correlation with soil available potassium content, the correlation coefficient is0.211*;100-grains weight was negatively correlated with soil total nitrogen content, the correlation coefficient is-0.207*.5. Maize and soybean intercropping composite yield is significantly positive correlation with the late March rainfall (0.891*), and the middle of May rainfall is significantly positive correlation (0.975**), and soybean growth period had little relation to rainfall. The main effect of late March rainfall is ear No., main effect in the middle of May rainfall is kernel No.. |
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