Study On The Photosynthetic Characteristics And Yield Formation Jujube-wheat/cotton Intercropped Patterns

Xinjiang has the outstanding light hot condition.According to the agricultural production development request,the Xinjiang Lin Guoye sown area unceasingly is increasing at present.Facing limited may plough the land resource,both must guarantee the food security,and must safeguard produces the strategic commodity cotton,can create the Xinjiang oasis fruit tree and the grain,cotton's struggle contradictory.But the jujube ? wheat,the cotton and kapok system can solve the jujube tree and the wheat,cotton's struggle question properly,causes the jujube,the wheat,cotton and kapok coordinated development,promotes the peasant household to additionally receive,improvement ecological environment.Based on this,we have carried out the research which the jujube ? wheat,the cotton and kapok system photosynthesis characteristic and the output form.The experiment 15 links 37 place developments in 150 groups,has studied two kind of crops' high,the biomass,the leaf area index dynamic change and the photosynthesis characteristic and the output formation,and sought has suited the local jujube ? wheat,the cotton and kapok system disposition pattern,for this local construction benefit good,the ecology friendly jujube ? wheat,the cotton and kapok system planter pattern provided the theory basis and the data reference.The research conclusion is as follows:1.In jujube ? cotton and kapok system,is away from the jujube tree to be farther,the interplanting cotton receives provides shade the effect to be smaller.Interplanting cotton presents the seedling stage slow growth high,the flowering season fast growth,the peak flowering period maintains the steady change tendency;The cotton biomass,the leaf area index presents the seedling stage to the flower bud time slow increase,the colored bell time fast increase,the boll opening time reduces slowly change tendency.2.In jujube ? cotton and kapok system,is away from the jujube tree to be nearer,the cotton output is lower.L1 place harvest number and Shan Zhujie bell number and L3 place existence remarkable difference;The jujube tree displays the remarkable influence to the interplanting cotton's output constitution factor and the output,also during 2 years change the rule to be consistent;Is nearer from the jujube tree,cotton's SPAD,only photosynthesizes speed(Pn),blowhole leading(Gs)is lower,L1 separately is more remarkable with L2 and the L3 difference,but transpiration speed(Tr),intercellular CO2 the density(Ci)difference is not remarkable.3.In jujube ? wheat system,is away from the jujube tree to be farther,provides shade the effect to the wheat to be smaller.The interplanting wheat high seedling stage slow growth,the jointing stage fast growth,the grouting time maintenance is steady;The wheat biomass,the leaf area index presents the seedling stage slow growth,the jointing earing period fast growth,the change tendency which the stage of wax ripeness reduces slowly.4.In the jujube ? wheat system,is away from the jujube tree to be nearer,the wheat output is lower;The wheat harvest,an ear of number of seeds,the weight of a thousand seeds reduce;Wheat's SPAD,only photosynthesizes speed(Pn),blowhole leading(Gs)reduces unceasingly,L1 separately the difference is remarkable with L2 and L3.But transpiration speed(Tr),intercellular CO2 the density(Ci)difference is not remarkable.5.In the jujube ? cotton and kapok,the wheat system the interplanting crops' output with only makes separately the cotton,the wheat output carries on the contrast.The jujube ? cotton and kapok,the wheat system economic efficiency compared to only makes the cotton,wheat's good,explained the interplanting system has the compensation effect to the natural resource use,enable the land-use capability to obtain the enhancement,two kind of interplanting patterns have the interplanting superiority.