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- Title
Effects of N, P and K Fertilizers on Growth of Clover Nitrogen-fixing Rhizobia and Soil Fertility after Plantation.
- Authors
Yabai LIU; Qingfeng ZHU; Daojie BI; Runfang WANG
- Abstract
In order to develop organic rice and increase paddy soil fertility by cloverorganic rice rotation, the effects of N, P and K fertilizers on growth of clover nitrogen- fixing rhizobia and soil fertility after plantation were investigated, thereby providing certain reference for reasonable cultivation of clover and improvement of soil fertility. A two-year experiment was conducted from 2012 to 2013. The clover was cultivated after rice every year, arid different levels of N, P and K fertilizers were applied before winter. In the treatment group, no fertilizer was applied. The effects of different fertilizers and different application amounts on clover yield, nitrogen-fixing rhizobia quantity, nitrogen-fixing rhizobia weight and soil fertility after plantation were analyzed. The results showed that the application of N, P and K fertilizers in the early stage had significantly effect on the growth of clover. When the application amount of N fertilizer was 75 kg/hm2 (N 46%), the clover yield, nitrogen-fixing rihizobia quantity and nitrogen-fixing rhizobia weight were highest The soil nitrogen content after plantation increased with the increase of the application amount of N fertilizer, while the P and K content decreased and then increased with the increased application amounts. Soil available P content increased with the increased application amounts of N and P fertilizers, but it did not change significantly with the increased application amount of K fertilizer. Soil available K content increased first and then decreased with the increased application amounts of N and P fertilizers. When the application amounts of N and P fertilizers were 150 (N 46%) arid 300 (P2O5 12%) kg/hm2, soil available K content reached the maximum. Soil organic matter content increased with the increased application amounts of N, P and K fertilizers. Therefore, in the cultivation of clover, appropriate application of N, P and K fertilizers in the early stage can improve clover yield and soil fertility.
- Subjects
CLOVER; EFFECT of nitrogen fertilizers on plants; SOIL fertility; EFFECT of potassium fertilizers on plants; EFFECT of sodium on plants; PLANT yields
- Publication
Agricultural Science & Technology, 2016, Vol 17, Issue 4, p906
- ISSN
1009-4229
- Publication type
Article