摘要
In order to improve the yield and fertilizer utilization of the ricecrayfish rotation and direct seeding rice Nongxiang 32,the effects of different soil preparation and fertilizer application methods on the growth,yield and fertilizer utilization of the variety were studied.The results showed that,under the rice-crayfish rotation and direct seeding farming mode,the contributions of seed setting rate,1000-grain weight,yield,and fertilizer contribution rate to yield of Nongxiang 32 in the treatments with rotary tillage with base fertilizer,rotary tillage without base fertilizer and no-tillage with base fertilizer were relatively higher than those in the treatments with rotary tillage without fertilizer,no-tillage without fertilizer and no-tillage without base fertilizer,and there were no significant differences between the three treatments.Rotary tillage with base fertilizer and rotary tillage without base fertilizer significantly increased the total number of stems and tillers,total number of ears,and number of effective ears.Rotary tillage and application of base fertilizer also significantly increased the number of tillers,plant weight and weed suppression ability in the early stage of rice growth.Therefore,in the different soil preparation and fertilizer application methods,the application of base fertilizer with rotary tillage was the best,followed by rotary tillage without base fertilizer and no-tillage with base fertilizer.
为提高虾后直播稻农香32的产量和肥料利用率,研究了不同整地和施肥方式对其生长、产量、肥料利用率等的影响。结果表明:在虾后直播模式下,旋耕施基肥、旋耕不施基肥和免耕施基肥处理的结实率、千粒重、产量和肥料产量贡献率相对高于旋耕不施肥,免耕不施基肥和免耕不施肥处理;旋耕施基肥和旋耕不施基肥处理能显著增加总穗数和有效穗数,旋耕施基肥还能显著提高分蘖数、植株重量和杂草抑制能力。因此,在不同整地和施肥方法中,旋耕施基肥相对最优,其次为旋耕不施基肥和免耕施基肥。
基金
湖南省水稻产业技术体系建设首席专家项目(2019)
湖南省农业科技创新资金项目(2020XC16).
