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通过二年四季的水稻需肥规律研究,结果表明,元江河谷区水稻植株含N量生育前期高于后期;P、K含量早、晚稻明显不同,早稻生育中期含量较高,而且出现一个吸K高峰,前后期较低,晚稻的P、K含量与含N量的变化基本相同;从水稻一生中积累N、P、K总量的情况看,至抽穗期,其N、P、K积累量分别占全生育期积累总量:早稻为86、75、61%,晚稻为64、65、75%.根据该区水稻的吸肥利点,应采取相应的施肥措施,氮肥应早施重施,配合适量追施,磷肥早稻宜底、追结合,晚稻宜底施,钾肥早稻直追施,晚稻宜底、追结合.
The results showed that the content of N in the rice plants of Yuanjiang River Valley was higher than that in the late stage. The content of P and K was earlier and the late rice was obviously different. The content of early rice had a higher content in mid-term, and a K The peak and the late phase were lower. The content of P and K in late rice was basically the same as the content of N in rice. From the accumulation of N, P and K in rice during the whole life, the accumulation of N, P and K Respectively, accounting for the total amount of accumulated growth during the whole growth period: 86,75,61% for early rice and 64,65,75% for late rice.According to the fertilizer-absorbing points of paddy rice in the area, appropriate fertilization measures should be taken, With the amount of top-dressing, phosphate fertilizer early rice at the end, chasing the combination of late rice at the end of facilities, potash early topdressing, late rice to the bottom, chase after the combination.