Cow Manure Application Cuts Chemical Phosphorus Fertilizer Need in Silage Rice in Japan

Agronomy

Yuka Sasaki¹  Mitsuhiko Katahira¹  Thanh Tung Nguyen¹  Dhirendranath Singh² 

[1] Faculty of Agriculture, Yamagata University, 1-23 Wakaba-machi, Tsuruoka 997-8555, Yamagata, Japan;The United Graduate School of Agricultural Sciences, Iwate University, Morioka 020-8550, Iwate, Japan;

关键词: chemical fertilizer;    cow manure;    phosphorus balance;    Olsen phosphorus;    silage rice;    yield;   

DOI  :  10.3390/agronomy11081483

来源: DOAJ

【 摘 要 】

Cow manure is a good source of phosphorus (P). Here, we investigated whether the amount of P fertilizer can be reduced when cow manure is applied to paddy soil based on growth, P uptake, yield, and soil P status evaluation. Treatments included unfertilized control (CK); manure plus chemical nitrogen (N), potassium (K), and P fertilizer (MNK P); MNK and 75% P (MNK ¾ P); MNK and 50% P (MNK ½ P); MNK and 25% P (MNK ¼ P); and MNK. Manure was applied at the rate of 10 t ha⁻¹ in fresh weight base. The P fertilizer was applied at 34.9 kg P ha⁻¹ as full dose. Treatment with MNK resulted in the same growth, P uptake, and yield as that with the P fertilizer. P uptake and yield did not respond to P input from chemical fertilizer owing to high soil Olsen P levels. Moreover, MNK could maintain soil Olsen P and total P. Manure application resulted in a positive partial P balance. These results suggest that manure application can cut P fertilizer requirements in P-rich soils, while maintaining soil P for optimal rice growth and yield. By using cow manure in rice production, farmers can conserve finite P resources.

【 授权许可】

Unknown