【摘要】 研究表明，红壤旱地种植绿肥—印尼绿豆，能获得较高的生物量（每６６７ｍ２达６５２７ｋｇ至８２４６ｋｇ），其有机物质的归还系数达０８４至０８７。在本试验条件下，施肥对印尼绿豆养分归还报酬率高，Ｎ约１∶１０，Ｋ２Ｏ约１∶３７，Ｐ２Ｏ５约１∶１。在印尼绿豆的有机物总归还量中，人工归还的约占２／３，其中尤以占总秸杆量３２７～３７３％的刈嫩秸杆的养分含量最为丰富，其养分归还量占秸杆养分总归还量：Ｎ占４３６～５５７％，Ｐ２Ｏ５占４１８～５０３％，Ｋ２Ｏ占５５７～６１０％。印尼绿豆刈嫩秸杆中Ｋ２Ｏ的含量高达６７９％，具有明显富集钾素特性。更多还原

【Abstract】 The experiment was made on red earth. It was shown that the biomass of green gram is high (9790 5～12369 0kg/ha). The return coefficient of biomass is 0 04～0 87. The nutrient ratios of return to fertilizers to green gram are high. They are about 1∶10 for N, 1∶3 7 for K 2 O and 1∶1 for P 2 O 5 . The anthropogenic return biomass accounts for 2/3 of the total biomass of green gram. Of straw nutrients, the return percentages are 43 6～55 7% for N. 41 8～50 3% for P 2 O 5 , and 55 7～61 0% for K 2 O. The K 2 O content of straw in young green gram is 6 79%. It is clear that green gram is a potassium-enriched plant.更多还原