Effects of different mulching treatments on accumulation and translocation of dry matter and yield in winter wheat
A two-year field experiment was carried out from 2020 to 2022.There were four treatments inclu-ding straw strip mulching for 3 rows (SM3),straw strip mulching for 4 rows (SM4),straw strip mulching for 5 rows ( SM5) and film mulching ( PM),with open field no mulching ( CK) as control in the experiment.Effects of different mulching treatments on dry matter accumulation at regreening,dry matter accumulation and distribution in vegetative organs before and after anthesis,grain yield and economic benefit of winter wheat were analyzed.The re-sults showed that,compared with CK,mulching treatments increased the above-ground dry matter accumulation af-ter winter wheat jointing stage as well as the average growth rate and maximum relative growth rate.The growth days and rapid growth stage of straw strip mulching treatments were extended,while PM treatment was the opposite.Mulching measures promoted the distribution of dry matter in spike axis+glume and increased the traslocation a-mount and contribution rate of dry matter from anthesis vegetative organs to grains,with the performance of PM>SM5>SM3>SM4.In the two growing seasons,the average yield of straw strip mulching increased by 1.94%～18.43%,among which SM5 had the highest yield.The yield of SM5 treatment increased by 18.47%～27.28%.The economic benefit analysis showed that the output to input ratio of straw strip mulching treatment was significantly higher than that of PM treatment,and SM5 treatment had the highest net benefit,which increased the benefit by 989.81～1351.69 CNY·hm-2 compared with CK.In condusion,mulching treatment was beneficial to the above-ground dry matter accumulation and pre-flowering dry matter transfer to grain,and strawstrip mulching for 5 rows treatment had the best comprehensive effect of increasing yield and income,which can be a suitable cultivation mode for sustainable development of dryland wheat in Northwest China.
straw strip mulchingwinter wheatdry matter accumulation,distribution and operationyieldLogistic model
万方数据
维普
