营养诊断与平衡施肥对春小麦子粒的影响

The Effect of Nutrient Diagnosis and Balanced FertilizerApplication on Seed Characters of Spring Wheat

本文着重研究了营养诊断与平衡施肥对春小麦子粒（种子）几个主要性状指标的影响。结果表明：①在有限的调节次数内，穗粒数、结实率、千粒重与平衡施肥次数呈显著正相关；②调节１～３次，其种子生活力分别比ＣＫ提高３．０、４．２和７．２个百分点，发芽率分别提高４．１、４．９和９．７个百分点；③平衡施肥株高增加的意义表现出对穗粒数、结实率和千粒重的增加；其穗粒数和千粒重的增加分别占总增产的５７．１％～６３．７％和１２．９％～１８．６％。

This paper described the effects of nutrient diagnosis and balanced fertilizer application on seed characters of spring wheat.The results showed :(a) the number of grains, fruit-bearing rate and rain wt. had a notable positive correlation with the times of balanced fertilizer application; (b) With 1 to 3 times of adjustment ,the viabilties of seeds increased by 3.0,4.2 and 9.7 percent, compared with CK., respectively; (c) the significance of the increase of plant height with balanced fertilizer application was reflected by increasing the number of grains ,fruit - steering rate and grain wt.. The increase of the number of grains and grain wt. made up 57.1%-63.7% and 12.9%-18.6% of the total increase of yield respectively.