不同氮素水平下土壤水分对冬小麦干物质及养分分配的影响

Effects of Soil Moisture on Dry Mass of Winter Wheat and Distribution of Nutrient Elements under Different Nitrogenous Fertilizeres

１９８９—１９９１年采用盆栽方法，进行了不同氮素水平下土壤水分对冬小麦于物质及养分分配影响的研究，结果表明：冬小麦的生长状况与土壤水吸力（ＳＷＳ）有关，同时，在同样的土壤水分条件下，冬小麦产量随着施氮量的提高而提高，当正常水分条件施氮量超过１６ｋｇ／亩（Ｎ—Ｎ１６）和干旱条件超过１２ｋｇ／亩（Ｄ—Ｎ１２）时，产量将有所下降。通过对冬小麦产量的方差分析表明：氮肥效应。

The effect of soil moisture on dry mass of winter wheat and distribution of soil nutrients under different nitrogenous fertilizeres were studied by pot experiments in 1989￣ 1991. It was resulted that the growing state of wheat was related to the suction of soil moisture. The grain yield was raised with the increasing amount of appenied nitrogenous fertilizer at the same soil moisture,The same soil moisture, the yield would be lowed as amount of appenied nitrogenous fertilizer over 16kg/mu or 12kg/mu at the normal soil moisture, or over 12kg/mu of apply fertilizer at the dried condition,The effects of nitrogenous fertilizer,soil moisture and both of them on the yield are remarkableby analys is of variance of the wheat yield.