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以郑单958为试验材料,大田条件下通过传统耕作(CK)、隔行深松(T1)和行行深松(T2)研究耕作方式对春玉米根系空间分布与地上部生长发育和产量的影响。与CK相比,T1、T2处理根总量较大,根系空间分布合理,利于根系吸收深层土壤的水分及养分;叶面积在前期T1、T2处理优势不明显,生长中后期叶面积指数均高于CK;深松处理(T1、T2)的单株干物质积累量增加,最大干物质积累速率加快,达到最大干物质积累速率的日期(Tmax)推迟,干物质积累速率最大时的生长量(Wmax)增大,生长活跃天数(p)延长,单株干物质积累潜力(Dwp)明显升高。深松处理明显增加玉米产量,T1、T2处理较CK产量分别提高4.72%和5.46%。深松增产的主要因素在于千粒重的提高,两个深松处理(T1、T2)之间产量未达到显著差异;相对于T2处理,T1处理节约动力、经济效益较高。
Taking Zhengdan 958 as experimental material, the effects of tillage on root spatial distribution, shoot growth and yield of spring maize were studied under traditional cultivation (CK), deep subsoiling (T1) and deep subsoiling (T2) under field conditions. . Compared with CK, the total amount of T1 and T2 treatment roots were larger and the roots were distributed in a reasonable spatial distribution, which was good for root absorption of soil moisture and nutrients. The leaf area had no significant advantage in T1 and T2, but the leaf area index At CK, the accumulation of dry matter per plant increased with the increase of dry matter accumulation rate (T1, T2), the maximum dry matter accumulation rate was accelerated, the maximum dry matter accumulation rate (Tmax) was postponed, the maximum dry matter accumulation rate was Wmax increased, the number of days with active growth (p) prolonged, and the Dwp increased significantly. Subsoiling treatment significantly increased corn yield, T1 and T2 treatments increased CK production by 4.72% and 5.46%, respectively. The main factor of subsoiling production is the increase of 1000-grain weight. The yield of two subsoiling treatments (T1 and T2) did not reach significant difference. Compared with T2 treatment, T1 treatment saved the power and had higher economic benefits.