Slope farmland is a main type of agricultural land throughout northeast China.Long-term high intensity utilization and unreasonable farming have caused the deterioration of soil resources and a decrease in crop produc...Slope farmland is a main type of agricultural land throughout northeast China.Long-term high intensity utilization and unreasonable farming have caused the deterioration of soil resources and a decrease in crop production.Here,it was hypothesized that crop straw incorporation might help to reduce nutrient losses and increase maize yields across time and space.A field experiment for testing straw management practices on maize across three slope positions(top,back and bottom slopes)was conducted in Northeast China in 2018 and 2019.In this study,the dry matter accumulation(DMA),N accumulation(NA),N remobilization,postsilking N uptake and grain yield were measured under SI(straw incorporation)and NSI(no straw incorporation)across three slope positions of 100-m-long consecutive black soil slope farmland during the maize(Zea mays L.)growth stages.Compared with NSI,SI significantly increased DMA and NA at the silking and maturity stages.SI typically increased the N remobilization in all slope positions,and significantly increased N remobilization efficiency and contribution of N remobilization to grain on the back and bottom slopes.However,post-silking N uptake was only increased by SI on the top slope.SI generally increased the crop yield in three slope positions.In the SI treatments,the bottom slope was the highest yield position,followed by the top,and then the back slopes,suggesting that the bottom slope position of regularly incorporated straw might have increased the potential for boosting maize yield.Overall,the study demonstrated the outsized potential of straw incorporation to enhance maize NA and then increase the grain yield in black soil slope farmland.展开更多
In order to improve the quality of cultivated land in Liaoning Province in the light of local conditions, medium- and low-yielding farmland in Liaoning Province are divided into various zones according to characterist...In order to improve the quality of cultivated land in Liaoning Province in the light of local conditions, medium- and low-yielding farmland in Liaoning Province are divided into various zones according to characteristics of the terrain, and the practical and feasible improvement measures are put forward based on the current situation and main existing problems in the medium- and low-yielding farmland in different areas,展开更多
In line with the author’s long-time experience on soil reconnaissance, monitoring and scientific probes, this article expounds the vital significance in systematic build-up of pedological data, protection of arable l...In line with the author’s long-time experience on soil reconnaissance, monitoring and scientific probes, this article expounds the vital significance in systematic build-up of pedological data, protection of arable land, employment and renovation of the farmland soil in accordance with the local edaphic setting in a bid to increase the grain yield.展开更多
【目的】系统评价中国农田防护林对作物产量的影响。【方法】在中国知网和Web of Science公开发表的文献中,通过检索关键词“农田防护林和产量”构建目标数据库,利用整合分析研究农田防护林对作物产量的影响及其在不同环境条件下的变化...【目的】系统评价中国农田防护林对作物产量的影响。【方法】在中国知网和Web of Science公开发表的文献中,通过检索关键词“农田防护林和产量”构建目标数据库,利用整合分析研究农田防护林对作物产量的影响及其在不同环境条件下的变化。【结果】1)中国农田防护林对作物的平均增产率为16.4%,考虑林带占地因素后为5.6%;2)不同作物的增产效应有显著差异(Q_(M)=8.55,p=0.02),玉米(22.02%)增产率最大,小麦(14.36%)和水稻(11.15%)较低;3)不同气候类型(Q_(M)=1.8,p=0.79)和不同林网规格(Q_(M)=3.25,p=0.16)条件下农田防护林对作物产量的影响无显著差异;4)作物的增产效应和背景产量呈负相关,在产量低于9727.5 kg·hm^(-2)时具有显著增产效应。【结论】农田防护林可有效提高作物产量,是保障粮食安全和应对气候变化的有效途径,未来研究应适当关注政策工具的制定和综合经济效益的提升。展开更多
基金Supported by the Special Fund for Agro-scientific Research in Public Interest in China(201503119-06-01)。
文摘Slope farmland is a main type of agricultural land throughout northeast China.Long-term high intensity utilization and unreasonable farming have caused the deterioration of soil resources and a decrease in crop production.Here,it was hypothesized that crop straw incorporation might help to reduce nutrient losses and increase maize yields across time and space.A field experiment for testing straw management practices on maize across three slope positions(top,back and bottom slopes)was conducted in Northeast China in 2018 and 2019.In this study,the dry matter accumulation(DMA),N accumulation(NA),N remobilization,postsilking N uptake and grain yield were measured under SI(straw incorporation)and NSI(no straw incorporation)across three slope positions of 100-m-long consecutive black soil slope farmland during the maize(Zea mays L.)growth stages.Compared with NSI,SI significantly increased DMA and NA at the silking and maturity stages.SI typically increased the N remobilization in all slope positions,and significantly increased N remobilization efficiency and contribution of N remobilization to grain on the back and bottom slopes.However,post-silking N uptake was only increased by SI on the top slope.SI generally increased the crop yield in three slope positions.In the SI treatments,the bottom slope was the highest yield position,followed by the top,and then the back slopes,suggesting that the bottom slope position of regularly incorporated straw might have increased the potential for boosting maize yield.Overall,the study demonstrated the outsized potential of straw incorporation to enhance maize NA and then increase the grain yield in black soil slope farmland.
文摘In order to improve the quality of cultivated land in Liaoning Province in the light of local conditions, medium- and low-yielding farmland in Liaoning Province are divided into various zones according to characteristics of the terrain, and the practical and feasible improvement measures are put forward based on the current situation and main existing problems in the medium- and low-yielding farmland in different areas,
文摘In line with the author’s long-time experience on soil reconnaissance, monitoring and scientific probes, this article expounds the vital significance in systematic build-up of pedological data, protection of arable land, employment and renovation of the farmland soil in accordance with the local edaphic setting in a bid to increase the grain yield.
文摘【目的】系统评价中国农田防护林对作物产量的影响。【方法】在中国知网和Web of Science公开发表的文献中,通过检索关键词“农田防护林和产量”构建目标数据库,利用整合分析研究农田防护林对作物产量的影响及其在不同环境条件下的变化。【结果】1)中国农田防护林对作物的平均增产率为16.4%,考虑林带占地因素后为5.6%;2)不同作物的增产效应有显著差异(Q_(M)=8.55,p=0.02),玉米(22.02%)增产率最大,小麦(14.36%)和水稻(11.15%)较低;3)不同气候类型(Q_(M)=1.8,p=0.79)和不同林网规格(Q_(M)=3.25,p=0.16)条件下农田防护林对作物产量的影响无显著差异;4)作物的增产效应和背景产量呈负相关,在产量低于9727.5 kg·hm^(-2)时具有显著增产效应。【结论】农田防护林可有效提高作物产量,是保障粮食安全和应对气候变化的有效途径,未来研究应适当关注政策工具的制定和综合经济效益的提升。
