夏播黑花生干物质积累与氮磷钾吸收分配特点研究

Studies on the Summer Black Peanuts' Dry Matter Accumulation and Distribution of NPK Absorption Characteristics

大田试验研究了夏播黑花生干物质积累及其对氮、磷、钾的吸收特点,结果表明:植株总干重自出苗后随生育期的推移而持续上升,以8月中下旬增长速度最快;总过程可以分为缓慢增长期、快速增长期和稳定期3个不同时期,并分别以7月中旬和8月下旬为两个重要转折点。对氮、磷、钾的养分需求为前期少,出苗后前70天养分吸收量不足总量1/3,以后迅速上升,至收获前仍保持缓慢上升势头,后40天左右养分吸收量占总量的2/3。每生产100 kg荚果需吸收氮(N)5.65 kg,磷(P2O5)0.83 kg,钾(K2O)关3.8键4 k词g:,氮黑花︰磷生;︰干钾物=质1︰;养0.1分47吸︰收0.量64;8日。

The field test have studied the accumulation of dry matter for black peanut sowed in summer and characteristics of absorption of N, P, and K, which show that the total plant dry weight mounted up at the duration of plant＇ s growth, and the most fasted growth period was appeared at the late of August. The total process was divided into the slow rise period, the fast rise period and the stabilization period, and the important turning points was appeared at the mid-July and the late of August respectively. The plant demand little N, P, K at the earlier period, after the plant emerging, the total absorbed nutrient （TAN） was insufficient of 1/3 at the first of 70 days, then raised greatly until the harvest time, and the TAN was almost the 2/3 at the late of 40 days. To produce 100 kg pods the plant need assimilate N 5.65 kg, P2O5 0.83 kg, K2O 3.84 kg, N ： P2O5 ： K2O=1 ： 0.147 ： 0.648.