| Vigorously mining rape production potential, improve rape production, is the coremeasures to guarantee our country cooking oil and feeding protein supply security, is alsothe effective way to increasing the farmers' income, optimize the planting industry structure,improve the life of rural residents. The dry mountainous lands of the West China is the mainproducing areas of rape.And the technology and production levels of rape have veryimportant part to the national rape production.To optimize surface coverage cultivationtechniques of spring rape in this region.This experiment use qinza3as test varieties,respectively studied the effects of different surface coverage ways, lateral membrane rapeplant density and fertilization on spring rape dry matter accumulation,distribution and theproduction. The experiment results showed that:1. The impact of different field mulching planting patterns on leaf area and leaf areaindex dynamics of rape varied. All mulching modes were helpful for leaf area and leaf areaindex, And FUFRP and FLOP were most significant increased leaf area and leaf area indexin comparison with CK, but not significant under FLW.2. The impact of different field mulching planting patterns on dry matter distributionratio of rape organs varied, all muching modes were speeding up transfer ratios andcontribution ratios of rape leaves, stem dry matter to pods. The dry matter contribution ofstem to pods under FUFRP and FLOP were increased by2.21%and3.01%respectivelycompared with CK.But the dry matter contribution of leaf was the biggest, and increased by1.01%and0.83%respectively.Compared with CK, FUFRP and FLOP improved the drymatter weight of per plant and yield per unit area significantly,and increased the yield byover30%, should be widespread popularized in production,but had no significant differencewith FLW.3. The impact of different planting density on leaf area and LAI dynamics of rapevaried.The leaf area and LAI were maximum in early flowing stage under differenttreatment,and with the advancement of reproductive process showed decreasing trend.Asthe density grows,the leaf area of per plant was decreased,but the LAI was increased at firstand then decreased trend.The inceased of l planting density was not helpful in incease leaf area per plant and LAI.4. The planting density had significant effects on dry matter accumulation andcontribution ratios of rape per plant in planting in side film,and the dry matter accumulationwas decreased with increasing density,so the higher density planting was not conducive toformate dry matter per plant.The contribution rate to pods of rape stem and leaves ascendedat first and then descended with adding of planting density.In dry mountainous areas ofwestern China, it is recommended to plant at67.5000/hm2under ridge film mulching andfurrow seeding, which may achieve20%higher output than the existing local plantingdensity of450000/hm2.5. The effect of different fertilizater amount on leaf area and LAI was significantvariation.And they first increased and then decreased.The fertilization processing speed upthe transfer rate of dry matter to pods. The production has been increased as increasing thestraight fertilizer in certain fertilizer range,but too much fertilizer against the yield of rapeincreased.The fertilizer response function of rape production has been gotten,and theapplication rates of N,P and K fertilizers as rape yield was maximum were obtained by useof computer technique.The maximum fertilization capacity of N,P,K were154.2kg,89.7kgand60.3kg, and the fertilizer ratio was1:0.58:0.39,the maximum yield was1760.55kg·hm-2.But the best optimum fertilization of N,P,K was105.00kg,27.45kg and34.65kg, and the fertilizer ratio was1:0.26:0.33,the best fertilizer production was1698.75kg·hm-2.6. Analysised the correlation of rape plant dry matter weight and yield per unit areaunder different fertilization treatment, the optimum linear regression equations was:y=50.438+2.163x,per plant dry weight and yield presented a positive correlation.TheN2P2K2were helpful for dry matter accumulation and raise per unit yield. |
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