田间管理措施对滨海盐渍地区中低产田生产力的影响OACSTPCD

Exploring the intensive planting scheme to improve the agricultural productivity of coastal salinized farmland,the field positioning trial conducted in Kenli district,Shandong province was carried out since 2015,and 4 treatments were set up by considering fertilizer application amount,fertilizer application period,planting density,soil amendment and other measures including farmer's practice(FP),improved soil management(ISM),improved crops management(ICM),integrated soil crop management(ISCM).Track the population dynamic changes in the key growth period of wheat,analyzed the dry matter accumulation and nitrogen,phosphorus and potassium nutrient absorption of wheat and maize during harvest,investigated the changes of wheat and maize yield and yield components,and compared the net income of crop production,soil sodium removal rate and sodium adsorption ratio in the 0-20 cm soil layer after harvest.The results showed that compared with FP treatment,ISM significantly increased the number of ears during wheat and maize harvest,resulting in a 25.2%and 10.0%increase in yield,and a 7.8%increase in net income,respectively.In addition,the soil sodium removal rate of ISM treatment reached 78.6%.The ICM treatment significantly increased the dry matter accumulation of wheat and maize,with a yield increase of 17.8%and 10.7%,respectively,compared to the FP treatment,and the net income increase of 19.3%.The ISCM treatment obtained the highest wheat yield of 11.96 and 10.83 t·hm-2,respectively,the net income increased by 20.8%compared to the FP treatment,and the soil sodium removal rate reached 82.9%.The ISM treatment could significantly reduce the sodium ion content of salinized soil,improve the nutrient absorption capacity of wheat and maize,and increase yield.Although the yield increase effect of ICM treatment was lower than that of ISM treatment,lower input cost could obtain higher net benefit.On the whole,the ISCM treatment could simultaneously achieve soil quality improvement,crop yield increase and economic benefits,which was the optimal management practice scheme under the conditions of this study.This research result could provide technical and theoretical support and demonstration models for improving the production capacity of medium to low yield fields in the region.