Remote Sensing Technology and Application 鈥衡�� 2020, Vol. 35 鈥衡�� Issue (1): 111-119.DOI: 10.11873/j.issn.1004-0323.2020.1.0111

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Precision Evaluation of Drought Index based on CCI Soil Moisture Products and Its Effect on Grain Yield in Northeast China

Lei Li1,2(),Xingming Zheng1,3(),Kai Zhao1,3,Xiaofeng Li1,3,Guangrui Wang1,2   

  1. 1. Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
    3. Changchun Jingyuetan Remote Sensing Test Site of Chinese Academy of Sciences, Changchun 130102, China
  • Received:2019-12-20 Revised:2020-01-18 Online:2020-04-01 Published:2020-02-20
  • Contact: Xingming Zheng

鍩轰簬CCI鍦熷¥姘村垎浜у搧鐨勫共鏃辨寚鏁扮簿搴﹁瘎浠峰強鍏跺涓滃寳鍦板尯绮浜ч噺鐨勫奖鍝�

鏉庨浄1,2(),閮戝叴鏄�1,3(),璧靛嚡1,3,鏉庢檽宄�1,3,鐜嬪箍钑�1,2   

  1. 1. 涓浗绉戝闄笢鍖楀湴鐞嗕笌鍐滀笟鐢熸�佺爺绌舵墍锛屽悏鏋� 闀挎槬130102
    2. 涓浗绉戝闄㈠ぇ瀛︼紝鍖椾含 100049
    3. 涓浗绉戝闄㈤暱鏄ュ噣鏈堟江閬ユ劅瀹為獙绔欙紝鍚夋灄 闀挎槬130102
  • 閫氳浣滆��: 閮戝叴鏄�
  • 浣滆�呯畝浠�:鏉� 闆�(1991-)锛岀敺锛屾渤鍖楀畾宸炰汉锛屽崥澹爺绌剁敓锛屼富瑕佷粠浜嬪湡澹ゆ按鍒嗐�佸畾閲忛仴鎰熺爺绌躲�侲?mail:lilei@iga.ac.cn銆�
  • 鍩洪噾璧勫姪:
    鍚夋灄绉戞妧鍙戝睍璁″垝浼樼闈掑勾浜烘墠宸ョ▼椤圭洰(20170520078JH);鍥藉鑷劧绉戝鍩洪噾闈笂椤圭洰(41971323)

Abstract:

Soil moisture is the basic factor for monitoring crop drought. Based on the microwave remote sensing soil moisture products of ESA from 1978 to 2014, the statistical database of China's economic and social development and meteorological data, combined with the Soil Moisture Deficit Index (SWDI), the relationship between the degree of drought in Northeast China and corn yield was analyzed. The results show that: (1) the drought level of the three provinces is increasing from northeast to southwest; (2) the SWDI drought index calculated based on CCI (Climate Change Initiative) soil moisture products has a good correlation with rainfall and temperature, which can be used to evaluate the severity of drought; (3) the correlation between SWDI and maize yield is the best in the key water demand period (July), and R2 of Heilongjiang, Jilin and Liaoning provinces are 0.43, 0.78 and 0.38 respectively, which is very suitable for quantifying the effect of drought on maize yield. This conclusion has important guiding significance for the study of the influence of soil moisture content on crop yield and the relevant agricultural decision-making.

Key words: Microwave remote sensing, Soil moisture, Drought index, Corn yield, Northeast China

鎽樿锛�

鍦熷¥姘村垎鏄洃娴嬩綔鐗╂棻鎯呯殑鍩烘湰鍥犲瓙锛屼互娆х┖灞�1978~2014骞村井娉㈤仴鎰熷湡澹ゆ按鍒嗕骇鍝併�佷腑鍥界粡娴庝笌绀句細鍙戝睍缁熻鏁版嵁搴撲互鍙婃皵璞℃暟鎹负鍩虹锛岀粨鍚堝湡澹ゆ按鍒嗕簭缂烘寚鏁帮紙Soil Water Deficit Index, SWDI锛夊垎鏋愪笢鍖楀湴鍖虹殑骞叉棻绋嬪害涓庣帀绫充憨浜х殑鍏崇郴銆傜粨鏋滆〃鏄庯細鈶犱笢鍖椾笁鐪佸共鏃辩▼搴︾┖闂翠笂鍛堢幇鑷笢鍖楀悜瑗垮崡閫愭笎鍔犻噸鐨勭┖闂村垎甯冩ā寮忥紱鈶″熀浜嶤CI (Climate Change Initiative)鍦熷¥姘村垎浜у搧璁$畻鐨凷WDI骞叉棻鎸囨暟涓庨檷闆ㄩ噺鍜屾皵娓╂湁鑹ソ鐨勭浉鍏冲叧绯伙紝鍙敤浜庤瘎浼板共鏃卞彂鐢熺殑涓ラ噸绋嬪害锛涒憿鐜夌背鐢熼暱瀛e叧閿渶姘存湡鈥斺��7鏈堢殑SWDI涓庣帀绫充骇閲忕殑鐩稿叧鎬ф渶濂斤紝浜岃�呭湪榛戦緳姹熴�佸悏鏋楀拰杈藉畞鐪佺殑R2鍒嗗埆涓�0.43銆�0.78鍜�0.38锛岄潪甯搁�傚悎鐢ㄤ簬璇勪及骞叉棻瀵圭帀绫冲崟浜х殑褰卞搷銆傝缁撹瀵逛簬鐮旂┒澶ц寖鍥村湡澹ゆ按鍒嗗惈閲忓鍐滀綔鐗╀骇閲忕殑褰卞搷浠ュ強鐩稿叧鍐滀笟鍐崇瓥鍏锋湁閲嶈鎸囧鎰忎箟銆�

鍏抽敭璇�: 寰尝閬ユ劅, 鍦熷¥姘村垎, 骞叉棻鎸囨暟, 鐜夌背浜ч噺, 涓滃寳鍦板尯

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