摘要
本文研究了高产夏玉米器官中氮、磷、钾积累量和累进强度，以及在各部位中的分配与转移情况。结果表明，每公顷生产１１６１３ｋｇ籽粒，三要素的最高积累量氮为２３０．２５ｋｇ，磷为１０４．２５ｋｇ，钾为２１２．７０ｋｇ，生产１００ｋｇ籽粒需吸收氮、磷、钾分别为１．９８３，０．８９８，１．８３２ｋｇ，三者比例为２．２１：１：２．０４．成熟时，籽粒中氮、磷、钾分配比率分别为５８．９１％，８２．４２％，１２．５４％，氮、磷、钾的最高累进速度分别为４．８６，２．４９，７．６２ｋｇ／ｈｍ２·ｄ．籽粒中６８．７１％的氮和３８．７８％的磷来自于地上部其它器官。
This paper dealt with the amount and rate ofN,P,K accumulation,and the state of dis-tribution and transference in every part of high-yield summer-sown corn plant. The resultsshowed as follows:when 11613kg corn grain yielded per hectare,the maximum requirementof N, P and K was 230.25kg,104.25kg and 212.7kg respectively. For producing 100kggrain,the amount of N,P and K needed was 1.983kg,0.898kg and 1.832kg at the ratio of2.21:1 :2.04.the maximum accumulation rate of N,P and K was 4.86,2.49 and 7.62kg/hm2·d,and the percentage of N, P and K in grain at maturity stage was 58.91%,82.42%and 12.5%, 68.71%of nitrogen and 38.78%of phosphorus in grain was ab-sorbed from above-ground Corn organs.
关键词
夏玉米
养分吸收
积累
分配
玉米
氮
磷
钾
summer-sown corn
nutrient uptake
accumulation and distribution
