论文部分内容阅读
本项研究针对旱瘠田和渍潜田的土壤特性，设定氮素、磷素和钾素水平的下上限分别为每亩５—１０ｋｇ、２—６ｋｇ、４—１２ｋｇ。研究结果表明，氮素水平对水稻产量影响最大，为第一因素，但旱瘠田早稻和渍潜田晚稻在上述施用范围内氮素用量与产量呈反相关；影响两种类型土壤早稻产量的第二因素为磷素水平；而影响晚稻的第二因素为钾素水平。因此，旱瘠田早稻需肥水平为低氮、高磷；旱瘠田晚稻需肥为高氮、高钾，其次是高磷。渍潜田早稻需肥水平为高氮、高磷，其次是高钾；渍潜田晚稻需肥水平为低氮、高钾。在产量构成因素中总粒数和实粒数与产量相关性密切。千粒重不是主要相关因素。不同施肥水平对两种类型低产田水稻生长势的影响差异不显著。
In this study, the upper limit of nitrogen, phosphorus and potassium levels for the soil characteristics of arid barren fields and stubborn fields were 5-10kg, 2-6kg and 4-12kg per acre respectively. The results showed that nitrogen level had the greatest effect on rice yield, which was the first factor. However, the amount of nitrogen application in the early and late paddy fields was inversely correlated with the yield; The second factor is the level of phosphorus, while the second factor affecting late rice is the level of potassium. Therefore, the dry fertilizer required for early rice in dryrid fields was low N and high P; late dry rice required high-N and high-K fertilizers, followed by high-P. The results showed that the need-fertilizer level of Zaotian early rice was high N and P, followed by high K; Among the components of production, the total number of grains and the number of real grains are closely related to the yield. Thousand grain weight is not the main relevant factor. The effect of different fertilization levels on the growth potential of two types of low-yielding rice was insignificant.